Coolant coming out overflow tank

Hi and thanks for using 2CarPros.

If the temperature isn't indicating that it's overheating, I have a feeling you have a bad head gasket again. What can happen is this; Compressed air from the combustion chamber can enter the cooling system. The result is it causes air to enter the cooling system. I have actually seen it blow the coolant out of the radiator. Often times, you will see bubbles in the coolant before it gets really bad.

Here is a link that shows how to check for a bad head gasket. Take a look through it and check some things yourself before taking it in. Also, with the engine cold, remove the radiator cap and start the engine. See if coolant blows out.

https://www.2carpros.com/articles/head-gasket-blown-test

Do this and let me know what you find.

Take care,
Joe

If it's that new, something was missed, not properly prepared, installed, or inspected. There could even be a crack in the head or block that was missed.

Hi, I have two questions. Is there white smoke from tailpipe? Does oil look like chocolate foam?

Also check out https://www.2carpros.com/articles/head-gasket-blown-testrepair guide Jacobandnickolas posted.

Wow. The guts are missing. Did you remove the missing parts from the engine? Now I'm starting to wonder if there is a blockage forcing coolant back to the radiator.

I have attached a picture showing the position of the what I call a jiggle valve, but in the picture it is referred to as a pin. Make sure the gasket is position the way it's shown too. If that pin is blocked or not positioned correctly, you will have a hard time getting air from the system.

Let me know if this helps.

Joe

I hope so. Has there been any change since you replaced it?

That makes total sense. With the guts missing from the thermostat, there was no restriction of coolant flow, so the engine could never warm up. Did this eliminate the issue with coolant loss? Also, I can't believe they put the bad thermostat back in. Confirm they removed the missing part.

Let me know.

Joe

Hi:
Dex-Cool is more of an orange and should not be mixed with other types of coolant. It may be a universal type coolant. You should confirm that.

Joe

There are a lot of colors of coolant out there these days but the color makes no real difference unless it is OEM coolant for the vehicle, the actual formula of the coolant does matter. The original reason for the colors was to make the shops life easier. Take GM for instance. Unless it was some odd special application they used the old (IAT) conventional Green antifreeze like everyone else. In 1996 GM introduced Dex-Cool, an OAT (Organic Acid Technology) formulation. GM asked the manufacturer to dye it Orange. This was so the folks servicing the vehicles at the dealer could simply look at the color instead of trying to determine which coolant to use. The other makes did the same as they switched to the new formulations as well.
This leads to a rainbow of colors in use today. Most of which are either OAT or some that are Hybrid OAT. The difference in those is that the Hybrid OAT actually brings back some silicates or other additives like phosphates from the old IAT formulas from the past into the new additive package.

The base ingredient in 99% of automotive anti-freeze regardless of type is Ethylene glycol at around 98%

For your Honda the OEM coolant is Honda type 2, the color would be Blue - That is an HOAT with a phosphate based additive package that is silicate, borate, nitrite and amine free. However, this is usually only found in Japanese built Honda vehicles

You say you have been using the Honda Green for years. That is the original OAT Honda used for many years. It is almost a twin blend of Dex-Cool.

If the Red you have in it now is a real OEM color matched formula it would be for Toyota, Lexus and Scion. It meets the exact same spec as the Honda Green that you have been using just in a brighter color.